With it you can back up your disk to network locations, optical and removable media, and other hard drives.
有了它，你可以备份你的磁盘到网络、光学和可移动媒介上，或者是其他硬盘驱动器上。
2
Use an external harddisk or network location that's big enough for the backup (you won't be around to flip DVDs or removable media in and out of a backup drive).